For his PhD thesis at the Structural Maintenance and Safety Laboratory (MCS) under the supervision of Emmanuel Denarié, Amir Hajiesmaeili sought to develop the next generation of ultra high-performance fiber-reinforced concrete (UHPFRC). His aim was to develop a material that retains the mechanical properties found in today’s UHPFRC, but without the steel fibers. The UHPFRC that Hajiesmaeili came up with is 10% lighter than UHPFRC with steel fibers, and its environmental impact is 60–70% lower. This new material is so effective that the first tech transfer will take place in 2020, when it will be used to strengthen a bridge. Instead of steel fiber, the researcher used a very stiff synthetic polyethylene fiber that adheres well to the cement matrix. He also replaced half of the cement, a commonly used binder in concrete, with limestone, a material that is widely available around the world.